filesetup.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <string.h>
   4 #include <assert.h>
   5 #include <dirent.h>
   6 #include <sys/stat.h>
   7 #include <sys/mman.h>
   8 #include <sys/types.h>
   9
  10 #include "fio.h"
  11 #include "smalloc.h"
  12 #include "filehash.h"
  13
  14 static int root_warn;
  15
  16 static int extend_file(struct thread_data *td, struct fio_file *f)
  17 {
  18         int r, new_layout = 0, unlink_file = 0, flags;
  19         unsigned long long left;
  20         unsigned int bs;
  21         char *b;
  22
  23         if (read_only) {
  24                 log_err("fio: refusing extend of file due to read-only\n");
  25                 return 0;
  26         }
  27
  28         /*
  29          * check if we need to lay the file out complete again. fio
  30          * does that for operations involving reads, or for writes
  31          * where overwrite is set
  32          */
  33         if (td_read(td) || (td_write(td) && td->o.overwrite))
  34                 new_layout = 1;
  35         if (td_write(td) && !td->o.overwrite)
  36                 unlink_file = 1;
  37
  38         if (unlink_file || new_layout) {
  39                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  40                         td_verror(td, errno, "unlink");
  41                         return 1;
  42                 }
  43         }
  44
  45         flags = O_WRONLY | O_CREAT;
  46         if (new_layout)
  47                 flags |= O_TRUNC;
  48
  49         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  50         f->fd = open(f->file_name, flags, 0644);
  51         if (f->fd < 0) {
  52                 td_verror(td, errno, "open");
  53                 return 1;
  54         }
  55
  56         if (!new_layout)
  57                 goto done;
  58
  59         dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
  60                                                         f->real_file_size);
  61         if (ftruncate(f->fd, f->real_file_size) == -1) {
  62                 td_verror(td, errno, "ftruncate");
  63                 goto err;
  64         }
  65
  66         dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
  67                                                         f->real_file_size);
  68         if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
  69                 td_verror(td, errno, "posix_fallocate");
  70                 goto err;
  71         }
  72
  73         b = malloc(td->o.max_bs[DDIR_WRITE]);
  74         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
  75
  76         left = f->real_file_size;
  77         while (left && !td->terminate) {
  78                 bs = td->o.max_bs[DDIR_WRITE];
  79                 if (bs > left)
  80                         bs = left;
  81
  82                 r = write(f->fd, b, bs);
  83
  84                 if (r == (int) bs) {
  85                         left -= bs;
  86                         continue;
  87                 } else {
  88                         if (r < 0)
  89                                 td_verror(td, errno, "write");
  90                         else
  91                                 td_verror(td, EIO, "write");
  92
  93                         break;
  94                 }
  95         }
  96
  97         if (td->terminate)
  98                 unlink(f->file_name);
  99         else if (td->o.create_fsync)
 100                 fsync(f->fd);
 101
 102         free(b);
 103 done:
 104         close(f->fd);
 105         f->fd = -1;
 106         return 0;
 107 err:
 108         close(f->fd);
 109         f->fd = -1;
 110         return 1;
 111 }
 112
 113 static unsigned long long get_rand_file_size(struct thread_data *td)
 114 {
 115         unsigned long long ret;
 116         long r;
 117
 118         r = os_random_long(&td->file_size_state);
 119         ret = td->o.file_size_low + (unsigned long long) ((double) (td->o.file_size_high - td->o.file_size_low) * (r / (RAND_MAX + 1.0)));
 120         ret -= (ret % td->o.rw_min_bs);
 121         return ret;
 122 }
 123
 124 static int file_size(struct thread_data *td, struct fio_file *f)
 125 {
 126         struct stat st;
 127
 128         if (fstat(f->fd, &st) == -1) {
 129                 td_verror(td, errno, "fstat");
 130                 return 1;
 131         }
 132
 133         f->real_file_size = st.st_size;
 134         return 0;
 135 }
 136
 137 static int bdev_size(struct thread_data *td, struct fio_file *f)
 138 {
 139         unsigned long long bytes;
 140         int r;
 141
 142         r = blockdev_size(f->fd, &bytes);
 143         if (r) {
 144                 td_verror(td, r, "blockdev_size");
 145                 return 1;
 146         }
 147
 148         f->real_file_size = bytes;
 149         return 0;
 150 }
 151
 152 static int get_file_size(struct thread_data *td, struct fio_file *f)
 153 {
 154         int ret = 0;
 155
 156         if (f->flags & FIO_SIZE_KNOWN)
 157                 return 0;
 158
 159         if (f->filetype == FIO_TYPE_FILE)
 160                 ret = file_size(td, f);
 161         else if (f->filetype == FIO_TYPE_BD)
 162                 ret = bdev_size(td, f);
 163         else
 164                 f->real_file_size = -1;
 165
 166         if (ret)
 167                 return ret;
 168
 169         if (f->file_offset > f->real_file_size) {
 170                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
 171                 return 1;
 172         }
 173
 174         f->flags |= FIO_SIZE_KNOWN;
 175         return 0;
 176 }
 177
 178 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 179 {
 180         int ret = 0;
 181
 182         dprint(FD_IO, "invalidate cache (%d)\n", td->o.odirect);
 183
 184         if (td->o.odirect)
 185                 return 0;
 186
 187         /*
 188          * FIXME: add blockdev flushing too
 189          */
 190         if (f->mmap)
 191                 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
 192         else if (f->filetype == FIO_TYPE_FILE)
 193                 ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
 194         else if (f->filetype == FIO_TYPE_BD) {
 195                 ret = blockdev_invalidate_cache(f->fd);
 196                 if (ret < 0 && errno == EACCES && geteuid()) {
 197                         if (!root_warn) {
 198                                 log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
 199                                 root_warn = 1;
 200                         }
 201                         ret = 0;
 202                 }
 203         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 204                 ret = 0;
 205
 206         if (ret < 0) {
 207                 td_verror(td, errno, "invalidate_cache");
 208                 return 1;
 209         }
 210
 211         return ret;
 212 }
 213
 214 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 215 {
 216         int ret = 0;
 217
 218         dprint(FD_FILE, "fd close %s\n", f->file_name);
 219
 220         remove_file_hash(f);
 221
 222         if (close(f->fd) < 0)
 223                 ret = errno;
 224
 225         f->fd = -1;
 226         return ret;
 227 }
 228
 229 static int file_lookup_open(struct fio_file *f, int flags)
 230 {
 231         struct fio_file *__f;
 232         int from_hash;
 233
 234         __f = lookup_file_hash(f->file_name);
 235         if (__f) {
 236                 /*
 237                  * racy, need the __f->lock locked
 238                  */
 239                 f->lock = __f->lock;
 240                 f->lock_owner = __f->lock_owner;
 241                 f->lock_batch = __f->lock_batch;
 242                 f->lock_ddir = __f->lock_ddir;
 243                 f->fd = dup(__f->fd);
 244                 f->references++;
 245                 from_hash = 1;
 246         } else {
 247                 f->fd = open(f->file_name, flags, 0600);
 248                 from_hash = 0;
 249         }
 250
 251         return from_hash;
 252 }
 253
 254 int generic_open_file(struct thread_data *td, struct fio_file *f)
 255 {
 256         int is_std = 0;
 257         int flags = 0;
 258         int from_hash = 0;
 259
 260         dprint(FD_FILE, "fd open %s\n", f->file_name);
 261
 262         if (!strcmp(f->file_name, "-")) {
 263                 if (td_rw(td)) {
 264                         log_err("fio: can't read/write to stdin/out\n");
 265                         return 1;
 266                 }
 267                 is_std = 1;
 268
 269                 /*
 270                  * move output logging to stderr, if we are writing to stdout
 271                  */
 272                 if (td_write(td))
 273                         f_out = stderr;
 274         }
 275
 276         if (td->o.odirect)
 277                 flags |= OS_O_DIRECT;
 278         if (td->o.sync_io)
 279                 flags |= O_SYNC;
 280         if (f->filetype != FIO_TYPE_FILE)
 281                 flags |= O_NOATIME;
 282
 283 open_again:
 284         if (td_write(td)) {
 285                 assert(!read_only);
 286
 287                 flags |= O_RDWR;
 288
 289                 if (f->filetype == FIO_TYPE_FILE)
 290                         flags |= O_CREAT;
 291
 292                 if (is_std)
 293                         f->fd = dup(STDOUT_FILENO);
 294                 else
 295                         from_hash = file_lookup_open(f, flags);
 296         } else {
 297                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 298                         flags |= O_RDWR;
 299                 else
 300                         flags |= O_RDONLY;
 301
 302                 if (is_std)
 303                         f->fd = dup(STDIN_FILENO);
 304                 else
 305                         from_hash = file_lookup_open(f, flags);
 306         }
 307
 308         if (f->fd == -1) {
 309                 char buf[FIO_VERROR_SIZE];
 310                 int __e = errno;
 311
 312                 if (errno == EPERM && (flags & O_NOATIME)) {
 313                         flags &= ~O_NOATIME;
 314                         goto open_again;
 315                 }
 316
 317                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 318
 319                 td_verror(td, __e, buf);
 320         }
 321
 322         if (get_file_size(td, f))
 323                 goto err;
 324
 325         if (!from_hash && f->fd != -1) {
 326                 if (add_file_hash(f)) {
 327                         int ret;
 328
 329                         /*
 330                          * OK to ignore, we haven't done anything with it
 331                          */
 332                         ret = generic_close_file(td, f);
 333                         goto open_again;
 334                 }
 335         }
 336
 337         return 0;
 338 err:
 339         close(f->fd);
 340         return 1;
 341 }
 342
 343 int open_files(struct thread_data *td)
 344 {
 345         struct fio_file *f;
 346         unsigned int i;
 347         int err = 0;
 348
 349         dprint(FD_FILE, "open files\n");
 350
 351         for_each_file(td, f, i) {
 352                 err = td_io_open_file(td, f);
 353                 if (err) {
 354                         if (td->error == EMFILE) {
 355                                 log_err("fio: limited open files to: %d\n", td->nr_open_files);
 356                                 td->o.open_files = td->nr_open_files;
 357                                 err = 0;
 358                                 clear_error(td);
 359                         }
 360                         break;
 361                 }
 362
 363                 if (td->o.open_files == td->nr_open_files)
 364                         break;
 365         }
 366
 367         if (!err)
 368                 return 0;
 369
 370         for_each_file(td, f, i)
 371                 td_io_close_file(td, f);
 372
 373         return err;
 374 }
 375
 376 /*
 377  * open/close all files, so that ->real_file_size gets set
 378  */
 379 static int get_file_sizes(struct thread_data *td)
 380 {
 381         struct fio_file *f;
 382         unsigned int i;
 383         int err = 0;
 384
 385         for_each_file(td, f, i) {
 386                 if (td->io_ops->open_file(td, f)) {
 387                         if (td->error != ENOENT) {
 388                                 log_err("%s\n", td->verror);
 389                                 err = 1;
 390                         }
 391                         clear_error(td);
 392                 } else {
 393                         if (td->io_ops->close_file)
 394                                 td->io_ops->close_file(td, f);
 395                 }
 396
 397                 if (f->real_file_size == -1ULL && td->o.size)
 398                         f->real_file_size = td->o.size / td->o.nr_files;
 399         }
 400
 401         return err;
 402 }
 403
 404 /*
 405  * Open the files and setup files sizes, creating files if necessary.
 406  */
 407 int setup_files(struct thread_data *td)
 408 {
 409         unsigned long long total_size, extend_size;
 410         struct fio_file *f;
 411         unsigned int i;
 412         int err = 0, need_extend;
 413
 414         dprint(FD_FILE, "setup files\n");
 415
 416         /*
 417          * if ioengine defines a setup() method, it's responsible for
 418          * opening the files and setting f->real_file_size to indicate
 419          * the valid range for that file.
 420          */
 421         if (td->io_ops->setup)
 422                 err = td->io_ops->setup(td);
 423         else
 424                 err = get_file_sizes(td);
 425
 426         if (err)
 427                 return err;
 428
 429         /*
 430          * check sizes. if the files/devices do not exist and the size
 431          * isn't passed to fio, abort.
 432          */
 433         total_size = 0;
 434         for_each_file(td, f, i) {
 435                 if (f->real_file_size == -1ULL)
 436                         total_size = -1ULL;
 437                 else
 438                         total_size += f->real_file_size;
 439         }
 440
 441         /*
 442          * device/file sizes are zero and no size given, punt
 443          */
 444         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 445             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 446                 log_err("%s: you need to specify size=\n", td->o.name);
 447                 td_verror(td, EINVAL, "total_file_size");
 448                 return 1;
 449         }
 450
 451         /*
 452          * now file sizes are known, so we can set ->io_size. if size= is
 453          * not given, ->io_size is just equal to ->real_file_size. if size
 454          * is given, ->io_size is size / nr_files.
 455          */
 456         extend_size = total_size = 0;
 457         need_extend = 0;
 458         for_each_file(td, f, i) {
 459                 f->file_offset = td->o.start_offset;
 460
 461                 if (!td->o.file_size_low) {
 462                         /*
 463                          * no file size range given, file size is equal to
 464                          * total size divided by number of files. if that is
 465                          * zero, set it to the real file size.
 466                          */
 467                         f->io_size = td->o.size / td->o.nr_files;
 468                         if (!f->io_size)
 469                                 f->io_size = f->real_file_size - f->file_offset;
 470                 } else if (f->real_file_size < td->o.file_size_low ||
 471                            f->real_file_size > td->o.file_size_high) {
 472                         if (f->file_offset > td->o.file_size_low)
 473                                 goto err_offset;
 474                         /*
 475                          * file size given. if it's fixed, use that. if it's a
 476                          * range, generate a random size in-between.
 477                          */
 478                         if (td->o.file_size_low == td->o.file_size_high)
 479                                 f->io_size = td->o.file_size_low - f->file_offset;
 480                         else
 481                                 f->io_size = get_rand_file_size(td) - f->file_offset;
 482                 } else
 483                         f->io_size = f->real_file_size - f->file_offset;
 484
 485                 if (f->io_size == -1ULL)
 486                         total_size = -1ULL;
 487                 else
 488                         total_size += f->io_size;
 489
 490                 if (f->filetype == FIO_TYPE_FILE &&
 491                     (f->io_size + f->file_offset) > f->real_file_size &&
 492                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 493                         need_extend++;
 494                         extend_size += (f->io_size + f->file_offset);
 495                         f->flags |= FIO_FILE_EXTEND;
 496                 }
 497         }
 498
 499         if (!td->o.size || td->o.size > total_size)
 500                 td->o.size = total_size;
 501
 502         /*
 503          * See if we need to extend some files
 504          */
 505         if (need_extend) {
 506                 temp_stall_ts = 1;
 507                 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
 508                         td->o.name, need_extend, extend_size >> 20);
 509
 510                 for_each_file(td, f, i) {
 511                         if (!(f->flags & FIO_FILE_EXTEND))
 512                                 continue;
 513
 514                         assert(f->filetype == FIO_TYPE_FILE);
 515                         f->flags &= ~FIO_FILE_EXTEND;
 516                         f->real_file_size = (f->io_size + f->file_offset);
 517                         err = extend_file(td, f);
 518                         if (err)
 519                                 break;
 520                 }
 521                 temp_stall_ts = 0;
 522         }
 523
 524         if (err)
 525                 return err;
 526
 527         if (!td->o.zone_size)
 528                 td->o.zone_size = td->o.size;
 529
 530         /*
 531          * iolog already set the total io size, if we read back
 532          * stored entries.
 533          */
 534         if (!td->o.read_iolog_file)
 535                 td->total_io_size = td->o.size * td->o.loops;
 536         return 0;
 537 err_offset:
 538         log_err("%s: you need to specify valid offset=\n", td->o.name);
 539         return 1;
 540 }
 541
 542 int init_random_map(struct thread_data *td)
 543 {
 544         unsigned long long blocks, num_maps;
 545         struct fio_file *f;
 546         unsigned int i;
 547
 548         if (td->o.norandommap || !td_random(td))
 549                 return 0;
 550
 551         for_each_file(td, f, i) {
 552                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / (unsigned long long) td->o.rw_min_bs;
 553                 num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) BLOCKS_PER_MAP;
 554                 f->file_map = smalloc(num_maps * sizeof(long));
 555                 if (!f->file_map) {
 556                         log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 557                         return 1;
 558                 }
 559                 f->num_maps = num_maps;
 560         }
 561
 562         return 0;
 563 }
 564
 565 void close_files(struct thread_data *td)
 566 {
 567         struct fio_file *f;
 568         unsigned int i;
 569
 570         for_each_file(td, f, i)
 571                 td_io_close_file(td, f);
 572 }
 573
 574 void close_and_free_files(struct thread_data *td)
 575 {
 576         struct fio_file *f;
 577         unsigned int i;
 578
 579         dprint(FD_FILE, "close files\n");
 580
 581         for_each_file(td, f, i) {
 582                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
 583                         unlink(f->file_name);
 584
 585                 td_io_close_file(td, f);
 586
 587                 sfree(f->file_name);
 588                 f->file_name = NULL;
 589
 590                 if (f->file_map) {
 591                         sfree(f->file_map);
 592                         f->file_map = NULL;
 593                 }
 594                 sfree(f);
 595         }
 596
 597         td->o.filename = NULL;
 598         free(td->files);
 599         td->files = NULL;
 600         td->o.nr_files = 0;
 601 }
 602
 603 static void get_file_type(struct fio_file *f)
 604 {
 605         struct stat sb;
 606
 607         if (!strcmp(f->file_name, "-"))
 608                 f->filetype = FIO_TYPE_PIPE;
 609         else
 610                 f->filetype = FIO_TYPE_FILE;
 611
 612         if (!lstat(f->file_name, &sb)) {
 613                 if (S_ISBLK(sb.st_mode))
 614                         f->filetype = FIO_TYPE_BD;
 615                 else if (S_ISCHR(sb.st_mode))
 616                         f->filetype = FIO_TYPE_CHAR;
 617                 else if (S_ISFIFO(sb.st_mode))
 618                         f->filetype = FIO_TYPE_PIPE;
 619         }
 620 }
 621
 622 int add_file(struct thread_data *td, const char *fname)
 623 {
 624         int cur_files = td->files_index;
 625         char file_name[PATH_MAX];
 626         struct fio_file *f;
 627         int len = 0;
 628
 629         dprint(FD_FILE, "add file %s\n", fname);
 630
 631         f = smalloc(sizeof(*f));
 632         f->fd = -1;
 633
 634         td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
 635
 636         td->files[cur_files] = f;
 637
 638         /*
 639          * init function, io engine may not be loaded yet
 640          */
 641         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 642                 f->real_file_size = -1ULL;
 643
 644         if (td->o.directory)
 645                 len = sprintf(file_name, "%s/", td->o.directory);
 646
 647         sprintf(file_name + len, "%s", fname);
 648         f->file_name = smalloc_strdup(file_name);
 649
 650         get_file_type(f);
 651
 652         switch (td->o.file_lock_mode) {
 653         case FILE_LOCK_NONE:
 654                 break;
 655         case FILE_LOCK_READWRITE:
 656                 f->lock = fio_mutex_rw_init();
 657                 break;
 658         case FILE_LOCK_EXCLUSIVE:
 659                 f->lock = fio_mutex_init(1);
 660                 break;
 661         default:
 662                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 663                 assert(0);
 664         }
 665
 666         td->files_index++;
 667         if (f->filetype == FIO_TYPE_FILE)
 668                 td->nr_normal_files++;
 669
 670         return cur_files;
 671 }
 672
 673 void get_file(struct fio_file *f)
 674 {
 675         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 676         assert(f->flags & FIO_FILE_OPEN);
 677         f->references++;
 678 }
 679
 680 int put_file(struct thread_data *td, struct fio_file *f)
 681 {
 682         int ret = 0;
 683
 684         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 685
 686         if (!(f->flags & FIO_FILE_OPEN))
 687                 return 0;
 688
 689         assert(f->references);
 690         if (--f->references)
 691                 return 0;
 692
 693         if (should_fsync(td) && td->o.fsync_on_close)
 694                 fsync(f->fd);
 695
 696         if (td->io_ops->close_file)
 697                 ret = td->io_ops->close_file(td, f);
 698
 699         td->nr_open_files--;
 700         f->flags &= ~FIO_FILE_OPEN;
 701         return ret;
 702 }
 703
 704 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 705 {
 706         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 707                 return;
 708
 709         if (f->lock_owner == td && f->lock_batch--)
 710                 return;
 711
 712         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 713                 if (ddir == DDIR_READ)
 714                         fio_mutex_down_read(f->lock);
 715                 else
 716                         fio_mutex_down_write(f->lock);
 717         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 718                 fio_mutex_down(f->lock);
 719
 720         f->lock_owner = td;
 721         f->lock_batch = td->o.lockfile_batch;
 722         f->lock_ddir = ddir;
 723 }
 724
 725 void unlock_file(struct thread_data *td, struct fio_file *f)
 726 {
 727         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 728                 return;
 729         if (f->lock_batch)
 730                 return;
 731
 732         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 733                 const int is_read = f->lock_ddir == DDIR_READ;
 734                 int val = fio_mutex_getval(f->lock);
 735
 736                 if ((is_read && val == 1) || (!is_read && val == -1))
 737                         f->lock_owner = NULL;
 738
 739                 if (is_read)
 740                         fio_mutex_up_read(f->lock);
 741                 else
 742                         fio_mutex_up_write(f->lock);
 743         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
 744                 int val = fio_mutex_getval(f->lock);
 745
 746                 if (val == 0)
 747                         f->lock_owner = NULL;
 748
 749                 fio_mutex_up(f->lock);
 750         }
 751 }
 752
 753 void unlock_file_all(struct thread_data *td, struct fio_file *f)
 754 {
 755         if (f->lock_owner != td)
 756                 return;
 757
 758         f->lock_batch = 0;
 759         unlock_file(td, f);
 760 }
 761
 762 static int recurse_dir(struct thread_data *td, const char *dirname)
 763 {
 764         struct dirent *dir;
 765         int ret = 0;
 766         DIR *D;
 767
 768         D = opendir(dirname);
 769         if (!D) {
 770                 char buf[FIO_VERROR_SIZE];
 771
 772                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
 773                 td_verror(td, errno, buf);
 774                 return 1;
 775         }
 776
 777         while ((dir = readdir(D)) != NULL) {
 778                 char full_path[PATH_MAX];
 779                 struct stat sb;
 780
 781                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 782                         continue;
 783
 784                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 785
 786                 if (lstat(full_path, &sb) == -1) {
 787                         if (errno != ENOENT) {
 788                                 td_verror(td, errno, "stat");
 789                                 return 1;
 790                         }
 791                 }
 792
 793                 if (S_ISREG(sb.st_mode)) {
 794                         add_file(td, full_path);
 795                         td->o.nr_files++;
 796                         continue;
 797                 }
 798                 if (!S_ISDIR(sb.st_mode))
 799                         continue;
 800
 801                 if ((ret = recurse_dir(td, full_path)) != 0)
 802                         break;
 803         }
 804
 805         closedir(D);
 806         return ret;
 807 }
 808
 809 int add_dir_files(struct thread_data *td, const char *path)
 810 {
 811         int ret = recurse_dir(td, path);
 812
 813         if (!ret)
 814                 log_info("fio: opendir added %d files\n", td->o.nr_files);
 815
 816         return ret;
 817 }
 818
 819 void dup_files(struct thread_data *td, struct thread_data *org)
 820 {
 821         struct fio_file *f;
 822         unsigned int i;
 823         size_t bytes;
 824
 825         if (!org->files)
 826                 return;
 827
 828         bytes = org->files_index * sizeof(f);
 829         td->files = malloc(bytes);
 830         memcpy(td->files, org->files, bytes);
 831
 832         for_each_file(td, f, i) {
 833                 struct fio_file *__f;
 834
 835                 __f = smalloc(sizeof(*__f));
 836
 837                 if (f->file_name)
 838                         __f->file_name = smalloc_strdup(f->file_name);
 839
 840                 td->files[i] = __f;
 841         }
 842 }
 843
 844 /*
 845  * Returns the index that matches the filename, or -1 if not there
 846  */
 847 int get_fileno(struct thread_data *td, const char *fname)
 848 {
 849         struct fio_file *f;
 850         unsigned int i;
 851
 852         for_each_file(td, f, i)
 853                 if (!strcmp(f->file_name, fname))
 854                         return i;
 855
 856         return -1;
 857 }
 858
 859 /*
 860  * For log usage, where we add/open/close files automatically
 861  */
 862 void free_release_files(struct thread_data *td)
 863 {
 864         close_files(td);
 865         td->files_index = 0;
 866         td->nr_normal_files = 0;
 867 }